notochord

• Structure souple en forme de tige qui constitue le principal axe de soutien du corps chez les cordés inférieurs et les vertébrés inférieurs, et qui est également présente dans les embryons des vertébrés supérieurs.

A flexible, rod-like structure that serves as the primary axial support in the bodies of the lowest chordates and lowest vertebrates, and is also present in the embryos of higher vertebrates.

1. Flexible supporting rodC2formalscientific

   A flexible, rod-shaped structure that forms the primary axial support in the bodies of chordates, including the embryos of vertebrates.

   Notochorde

   • The notochord is a defining feature of the phylum Chordata.
   • In vertebrate embryos, the notochord is eventually replaced by the vertebral column.
   • The notochord provides structural support and serves as a signaling center during development.